GIBBULA. 197 



Bubimperforate), spirally striate or lirate, generally conspicuously 

 painted with longitudinal stripes of red or brown. Species mostly 

 of the European seas. (See remarks under G. magus.) 



Section II. EURYTROCHUS Fischer. See definition on p. 12. 

 This section includes G. danieli, reevei, affinis, concinna, strangei, 

 mystica, and perhaps some other species. Its distribution is Australo- 

 Pacific. 



Section III. CALLIOTROCHUS Fischer. Small globose species, 

 with rounded, smooth or spirally striate whorls; thin; aperture 

 rounded, outer lip and columella simple, thin, arcuate ; umbilicus 

 narrow. Includes G. phasianellus, G. tasmanica, and perhaps some 

 other forms not seen by me. 



Section IV. CANTHARIDKLLA Pilsbry. Small forms with much 

 the aspect of tiny Cantharidus : usually polished, narrowly or not 

 perforate ; conical, elongated. G. picturata, fulminata, nitida, 

 stolitzkana, dupontiana, blanfordiana, tiberiana, yessoensis, calli- 

 chrous, and some othes species belong here. 



Section V. COXOTROCHUS Pilsbry. This type is quite distinct 

 in the elevated narrow, turrited form, narrowly umbilicate base, 

 tubular whorls, either striate or keeled. The shell is thin, minute, 

 lusterless, with circular aperture, not modified in form by the 

 parietal wall. The species are mariei, holdsworthiana, subplicata, 

 singaporensis, pantanellii. All are from the northern shores of the 

 Indian Ocean, Red Sea to .Singapore. 



A. Species Inhabiting European Seas. 



G. MAGUS Linne. PL 30, figs. 8, 9, 10. 



Shell widely, deeply umbilicate, low-conical, solid, whitish or yel- 

 lowish, painted with zigzag radiating stripes, maculations or lines of 

 pink or rich brown, sometimes so broken into minute flecks as to ap- 

 pear minutely mottled all over, or sometimes lacking markings ; base 

 radiately zigzag-striped ; spire conical, apex acute ; whorls 7 to 8, 

 swollen, gibbous and radiately plicate beneath the sutures, and with 

 a rim or flange at the periphery; entire surface spirally finely 

 striate ; base convex ; aperture very oblique, rounded-rhomboid, 

 smooth within ; columella oblique, its edge straight or slightly con- 

 vex in the middle, at its insertion reflexed slightly over the umbil- 

 icus ; umbilicus bounded by a strong spiral rib. 



Alt. 22, diam. 30 mill. 

 Mediterranean and temperate Atlantic Coasts of Europe ; Azores. 



